When I perform a Complete Compare between two models, Foreign Keys are not migrating over. How can make Foreign Keys map from one model to another?

When Comparing and Resolving Differences, the guidelines that govern importing or exporting objects are the same as creating objects manually in the model. For example, you can create a Foreign Key in the model by creating a relationship. Similarly when performing a Complete Compare, import or export a Foreign Key, by importing or exporting the relationship. To import or export a relationship, help ensure that both parent and child tables are in the scope of comparison.